In Italy, the value must be reported in EURO on the official act, and the payment must be made with a traceable means (no cash, for example).
Then, of course, all the taxes must be paid in euros.
You are right, the same happens in Portugal, the declared value of the goods is in EURO. Regardless of the payment method.
Great to see that being used in Portugal since it provably give an idea to people that they can used bitcoin for this type of deals.
Heard some several deals happen in Philippines by using bitcoin, But didn't see anything happened near my place. It will be so great if bitcoin will be used for this type of deals since this will open up some option for us to use bitcoin directly and escape those things that can give us any hassle.
I just see this site list some asset, but the value written is in USD
https://cryptorealestate.cc/property-city/philippines/ but also can't verify if this site is legitimate or not.